Patents by Inventor Ryuichi Kuronuma

Ryuichi Kuronuma has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 4278325
    Abstract: In an electronic timepiece having a liquid crystal display and a dynamic driving circuit for producing a display driving signal having an effective driving voltage, the dynamic driving circuit is provided with a device for detecting the capacitance of the liquid crystal to sense a change in ambient temperature. The effective driving voltage of the display driving signal is adjusted in response to changes in the detecting capacitance and thereby the ambient temperature to compensate for the changes. In this way, the "on" voltage of the display is maintained above the saturation voltage and the "off" voltage of the display is maintained below the threshold voltage thereof over a wide temperature range so as to eliminate cross talk.
    Type: Grant
    Filed: December 11, 1978
    Date of Patent: July 14, 1981
    Assignee: Kabushiki Kaisha Daini Seikosha
    Inventors: Kenichi Kondo, Ryuichi Kuronuma, Noboru Kaneko